As meters were left for GULERMAK PORR tunnel construction in Świnoujście, the news came that the Polish president would attend the breakthough on Thursday.

The funny thing is, nobody could see the actual breakthrough. This is because the receiving chamber has been submerged in water to balance pressure on TBM. This is a big moment the Chinese-made CREG TBM finishes tunnelling under the Świną river.

The tunnel be the longest underwater crossing in Poland: the 1484 m tunnel is bored with a TBM. The entire tunnel is 1,780 meters long including the sections constructed using roofing methods.

https://radioszczecin.pl/1,428799,wyspiarka-juz-u-celu-prezydent-odwiedzi-swinoujs